GB1149775A - Thin film resistors - Google Patents

Thin film resistors

Info

Publication number
GB1149775A
GB1149775A GB4214666A GB4214666A GB1149775A GB 1149775 A GB1149775 A GB 1149775A GB 4214666 A GB4214666 A GB 4214666A GB 4214666 A GB4214666 A GB 4214666A GB 1149775 A GB1149775 A GB 1149775A
Authority
GB
United Kingdom
Prior art keywords
resistor
resistors
impedance
standard
oscillator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4214666A
Inventor
Ronald Leslie Field
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ASSOCIATED SEMICONDUCTOR MFT
Original Assignee
ASSOCIATED SEMICONDUCTOR MFT
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ASSOCIATED SEMICONDUCTOR MFT filed Critical ASSOCIATED SEMICONDUCTOR MFT
Priority to GB4214666A priority Critical patent/GB1149775A/en
Publication of GB1149775A publication Critical patent/GB1149775A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
    • H01C17/22—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
    • H01C17/24—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material
    • H01C17/2408—Apparatus or processes specially adapted for manufacturing resistors adapted for trimming by removing or adding resistive material by pulsed voltage erosion, e.g. spark erosion

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Measuring Fluid Pressure (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)

Abstract

1,149,775. Resistors. ASSOCIATED SEMICONDUCTOR MFRS. Ltd. 21 Sept., 1966, No. 42146/66. Heading H1S. The impedance of a thin (nickel-chrome) film resistor 5, 4, 6 is adjusted to a desired figure by removing a portion of the film by erosion, using a radio frequency alternating current from oscillator 1 passing into the resistor through probe 3, the impedance being monitored at least during the erosion process 2 using an additional (direct) current passing through the resistor. The monitoring current passes through the resistor, and filters 12, 13 into a bridge measuring arrangement 10 containing a standard resistor the value of which is compared with that of the resistor 4, 5, 6. When balance is achieved, or when the impedance of the resistor 4, 5, 6 is within a predetermined percentage of that of the standard resistor, an output signal is applied through lead 14 to cut off the oscillator 1. The resistors may be made with a zero aging characteristic as described in Specification 1,147,340. Various standard resistors may be switched into the bridge circuit if a number of different resistors are being adjusted.
GB4214666A 1966-09-21 1966-09-21 Thin film resistors Expired GB1149775A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4214666A GB1149775A (en) 1966-09-21 1966-09-21 Thin film resistors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4214666A GB1149775A (en) 1966-09-21 1966-09-21 Thin film resistors

Publications (1)

Publication Number Publication Date
GB1149775A true GB1149775A (en) 1969-04-23

Family

ID=10423063

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4214666A Expired GB1149775A (en) 1966-09-21 1966-09-21 Thin film resistors

Country Status (1)

Country Link
GB (1) GB1149775A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451018A1 (en) * 1979-03-03 1980-10-03 Dynamit Nobel Ag METHOD FOR INCREASING THE RESISTANCE OF PREDETERMINED GEOMETRIC PRIMING ELEMENTS
EP0055331A2 (en) * 1980-12-31 1982-07-07 International Business Machines Corporation Method of trimming thin metal resistors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451018A1 (en) * 1979-03-03 1980-10-03 Dynamit Nobel Ag METHOD FOR INCREASING THE RESISTANCE OF PREDETERMINED GEOMETRIC PRIMING ELEMENTS
EP0055331A2 (en) * 1980-12-31 1982-07-07 International Business Machines Corporation Method of trimming thin metal resistors
EP0055331A3 (en) * 1980-12-31 1983-05-18 International Business Machines Corporation Method of trimming thin metal resistors

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